Free wysiwyg HTML javascrtipt editor that allows source code edit?

Question

I am looking for an editor for a blog site and time to time the users need to insert and later on also edit tag into the post. But in a way that the script actually works.

Does any editor allow users to insert and save working tag? Something like TinyMCE. https://www.tiny.cloud/blog/source-code-editing/ I do not like their pricing structure. Quill would be the best choice for me but https://github.com/quilljs/quill/issues/128

Note that I am selling subscription to the site so I am not sure if I can use CKEditor 5 because of GPL 2+

update

I did my research and explore

1. tinyMCE - 1000 loads per month might not be enough
2. quill - does not support inserting of tag
3. trix - does not support inserting of tag
4. editor.js - finding out if it supports inserting tag
5. brackets - finding out
6. ContentTool - looks promising. But I am not sure about the UI. Looks bit complicated for my target users
7. CKEditor - finding out if it supports insering tag
8. Froala - pricing
9. summernote - finding out
10. Pell - not developed anymore??
11. jodit - finding out
12. suneditor - finding out
13. ProseMirror - finding out